Swedish surgeons at Karolinska University Hospital have successfully grown a donor free trachea and transplanted it into a patient, who is now recovering and doing well. The organ was created using the patients own stem cells, which were harvested from his bone marrow, and was grown in just two days. Using stem cells in this manner means the body is less likely to reject the organ, and lab grown organs could be grown as needed, in a very short amount of time. Read more about the future of medicine over at PopSci.